I did a bit of a grep for urls in docstrings which could be
hyperlinked.  Diff below from the lisp dir.

2009-07-16  Kevin Ryde  <user42@zip.com.au>

	* gnus-sum.el (gnus-summary-idna-message): 
	* nnrss.el (nnrss-normalize-date, nnrss-discover-feed): 
	Hyperlink urls in docstrings with URL `...'.